To call in sick when you aren't you need a fundamental lack of respect for the company that pays your wages.
How would you feel if you paid a person £150 (or whatever) to do 8 hours work, and they pretended to be ill, but you still had to pay the cash? (I know this various with different employers)
I've pretended to be sick a few times, but only after my employers lost the plot and started wasting my time first.
It was extremely enjoyable & satisfying to know I was getting paid to play Medievil Total War all day
STE ;¬!